textproduct: Quad Cities

KEY MESSAGES

- A significant winter storm will impact the area Friday night through Saturday night. There are moderate to high probabilities (60-90%) for at least 8 inches of snow (especially along/north of I-80). Winter storm warnings have been issued for parts of the area with additional warnings possible.

- Below normal temperatures will be seen next week with the coldest day being Monday.

SHORT TERM /THROUGH FRIDAY/

Issued at 210 PM CST Thu Nov 27 2025

Mainly quiet and colder than normal with decreasing winds across the area through sunset Friday. A weak disturbance rotating down through Wisconsin into northern Illinois tonight may result in some flurries across far northwest Illinois. Attention then turns to the weekend system.

LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/

Issued at 210 PM CST Thu Nov 27 2025

Friday night through Saturday night Assessment...a near certainty (>99%) of a significant winter storm impacting the area

The much discussed and advertised winter storm will impact the area starting Friday night and continuing into Saturday night.

Dry air over the area will initially delay the start of the snow until mid to late evening as top-down saturation occurs. However, given the forcing present snow will quickly commence once the dry layer becomes thin enough.

Snow will overspread the area from west to east through sunrise Saturday. Saturday night snow will slowly end from west to east with most areas being dry by sunrise Sunday.

Given the long duration of the event, snowfall rates look to remain under 1 inch/hour. During the passage of the low center late Saturday afternoon/evening, snowfall rates may tick up to 1-1.5 inches/hour for a few hours, especially near the track of the low.

Probabilistic data indicates there is a 60-90% chance of seeing snowfall amounts exceeding 8 inches along/north of I-80. Stronger forcing may result in localized bands of snow approaching or exceeding 10 inches.

If the storm track would shift a bit further south (which has a 30- 40% probability of occurring) then the higher snowfall amounts (>8 inches) would include areas south of I-80.

Right now overall storm totals look to be around 6 inches south of a Keosauqua, IA to Macomb, IL line; 6-8 inches north of that line to just south of the I-80 corridor; then 8+ inches from the I-80 corridor on north.

Sunday through Thursday Assessment...near certainty (>95%) confidence of below normal temperatures

Northwest flow with fresh snow cover and a secondary polar airmass will help keep temperatures below normal for next week.

Some lingering light snow or flurries may be seen through mid- morning Sunday as the weekend storm system departs the area.

Outside of a weak system Monday afternoon/evening that potentially could give a dusting of snow, much of next week looks to be dry.

AVIATION /00Z TAFS THROUGH 00Z FRIDAY/

Issued at 519 PM CST Thu Nov 27 2025

Once again, a band of MVFR stratus is over the central "interstate 80" counties of our area, with VFR clear to the south and scattered VFR higher based clouds to the north. This band is sinking south, and will affect MLI and BRL through the early evening, before a VFR period develops for the rest of the period. Farther north, especially around DBQ, VFR weather is now in place, and will continue through the period. Some very light flurries may also be seen this evening under these clouds, but in general, we're moving into a quiet, light wind period of the forecast from 03z through tomorrow early evening.

After this TAF period, looking towards Friday mid to late evening and beyond, a winter storm will arrive, bringing IFR/LIFR conditions in heavy snow, fog, and low cigs.

DVN WATCHES/WARNINGS/ADVISORIES

IA...Winter Storm Warning from 9 PM Friday to 6 AM CST Sunday for IAZ040-051-052-063-064-076-077-087-088. Winter Storm Warning from midnight Friday night to 6 AM CST Sunday for IAZ041-042-053-054-065>068-078. Winter Storm Watch from late Friday night through late Saturday night for IAZ089-098-099. IL...Winter Storm Warning from midnight Friday night to 6 AM CST Sunday for ILZ001-002-007-009-015>018-024. Winter Storm Watch from late Friday night through late Saturday night for ILZ025-026-034-035. MO...Winter Storm Watch from late Friday night through late Saturday night for MOZ009-010.